Schools use an array of strategies to match curricula and instruction to students' heterogeneous skills. Although generations of scholars have debated ''tracking'' and its consequences, the literature fails to account for diversity of school-level sorting practices. In this article, we draw on the work of Sørensen and others to articulate and…

Asserts that students' opportunities to learn subjects can be organized into sequences that span grades and schools. Examines national patterns in opportunities for learning mathematics and science from grade 8 to grade 10. Finds that the level of mathematics in grade 8 is closely related to that taken in high school, but this is not true of…